I have a question...

For this post instead of having something explained or trying to explain something I've decided to ask a question that has been bothering me for quite some time now. What is it that makes relationships work? How does love happen? Can anyone really explain it? Why does it choose its own time? And since we talked about choices before, can we choose to fall in love as well? Or have we been doing that all along? If we can choose who to like and who not to why then is it that it bothers so many of us so much. The antiphons to the timing and how it happens for love really puzzles me. I cannot grasp any structure in it. Maybe it wouldn't be as wonderful if it had a structure and method. However it being not structural and being understood is a root of all its pain and problems too. What do you think?